Reducing the psi on your PW

Clean County PW

Clean County PW

Active member
Who here tends to reduce the psi on there pw when doing certain jobs?

I never do. I always leave my PW on what there set for which is the maximum that they can produce. What I do to reduce psi is I use different tips or I hold the wand further away to what I'm cleaning so that way I can clean a larger area also.

There is a formula that one can use to determine the psi thats actually hitting the object your cleaning.

I know the WIZ knows it. Its something like this if your PW is set at 3000psi and you have a 40 degree tip on it and the water coming out of the tip is1" away from the object then the pressure hitting that object would be 3000psi. If the same scenario but the water coming out is 3" away then the psi hitting that object is 1000psi.

I don't go by this because I can pretty much tell by observation if I am using to much/not enough pressure when cleaning because of years of experience.

But for someone who has less experience the formula comes in handy.

Wiz correct me if I'm wrong on the #'s for this formula.

John/Clean County PW
 
With the exception of cleaning concrete with my turbo nozzle, I always reduce the pressure. As a matter of fact, yesterday was the first time I used the full 3000psi this year!! I was doing a paint prep job.

I always use larger tip sizes to reduce the pressure. No need for it. GPM's are more important.
 
Mike,
I was talking about turning the pressure down from the unloader. I always reduce pressure by the tip I use but I never reduce pressure from the machine. Thats the point I was trying to make.

Do you ever reduce pressure from the machine?
 
tps-wheatley.jpg


If you click on the above link you should see a picture of our primary pump.

We adjust pressure by using a by-pass relief valve. We can set this pump from a few hundred pounds up to 3000 psi. We control volume by the tip that we select. We also use ballvalves on our hoses, so we can further reduce pressure/volume when needed.

Dave Olson
 
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